Insulator.



I PATENT-ED NOV. 1, 1904. L. W. GREENE. IN SULATOR.

'IION FILED W a m WW5 v E H 1% 3 6 no 4 m. WE I Patented November 1,1904.

PATENT QFFICE.

LEON W. GREENE, OF BROOKLYN, MICHIGAN.

INSULATOR.

SPECIFICATION forming part of Letters Patent No. 773,733, dated November1, 1904. Application filed Tovember 10, 1903. Serial No. 180,620- (Nomodel.)

To all whom it may concern:

Be it known that I, LEON W.GREENE, a citizen of the United States,residing at Brooklyn, in the county of Jackson and State of Michigan,have invented a new and useful Insulator, of which the following is aspecification. 1

This invention relates to insulators for electric conductors, but moreparticularly to that class of insulators employed in connection withwires or cables to prevent contact with the beams through which theypass. These insulators' are usually formed of rubber, porcelain, orasimilar material, the properties of which are such thatdifliculty is.experi-- enced in retaining the insulators in place upon the beams.

It is the primary object of this invention to provide an inexpensive andeflicient retainer which can be readily applied to and removed from theinsulator.

Another object is to provide a retainer which will be capable ofexpanding and contracting with the insulator and at all times remain inengagement therewith.

Further objects and advantages of this invention will appear in thefollowing description, and the novel features thereof will beparticularly pointed out in the appended claims, it beingunderstood thatIdo not limit -.myself to the precise form shown, but reserve the rightto make such slight changes and alterations as would properly comewithin the scope of the appended claims.

In the drawings, Figure 1 is a sectional view through a beam, theinsulator applied thereto being shown in elevation. Fig. 2 is verticallongitudinal sectional view through the insulator applied to a beam, andFig. 3 is a plan view of the retainer for the insulator.

In the preferred form of my invention as illustrated in the drawings, 1designates a tubular insulating member, at one end of which is a head 2.The member 1 is formed with a plurality of exterior corrugations orgrooves 3, which constitute seats for the expansible retainer 4, whichis adapted to be sprung into any one of the seats or removed therefromby spreading the terminal projections 4: thereof.

In actual practice it is intended to form the insulator of glass,porcelain, or similar material, so that it can be readily threaded .on aconductor 5 and inserted through an opening in a beam or other support6. The retainer or clamping member is preferably formed of spring metaland consists of a split ring of approximately the contour of the seats3, so

that when the terminal projections 4: are sprung apart the retainer maybe seated at any point on the insulator to hold the head 2 in contactwith the beam, whereby a transverse movement of the insulator will beprevented. Any type of expanding-tool may be employed for the purpose ofspringing the terminals apart, so as to remove the retainer.

I claim- 1. An insulator provided with a plurality of circumferentialgrooves or seats and a resilient clamping member independentlyadjustable in any one of said seats and contractible and expansible withthe insulator.

2. An insulator provided at one end with an enlarged head and at theother with aplurality of circumferential grooves or seats, and aresilient clamping member independently adjustable in any one of saidseats and contractible and ex'pansible with the insulator.

3. An insulator provided with a-plurality of circumferential grooves orseats and a resilient split ring independently adjustable in any one ofsaid seats and contractible and expansible with the insulator.

4:. An insulator provided with a plurality of circumferential grooves orseats, and aclamping member consisting of a single piece of spring metalbent to conform to the shape of the insulator and adapted to engage saidseats.

5. An insulator provided with a plurality of circumferential grooves orseats, and a clamping member formed of asingle piece of metal bent toform a pair of spring-arms adapted to engage said seats, said clampingmember being held in engagement with the seats by the inherent springtendency of said arms.

6. The combination with a support having an opening formed therein, of atubular insulator mounted in said opening and provided at one end withan enlarged head and at the other With a plurality of circumferential myown I have hereto afixed mysignaturein grooves or seats, and a clampingmember the presence of two Witnesses. formed of a single piece of metabent to form Y 1 1 a pair of curved spring-arms adapted to en- LEQNGREENE 5 gage the seats and having terminal projec- Witnesses:

tions for engagement with the support. CHAS. E. STUART, In testimonythat I claim the foregoing as A. ROY KNEPP.

